Tomoki Sakurai often encounters a strange girl in his dreams asking for his help, but he can't remember her face when he wakes up. When an Unidentified Mysterious Animal (U.M.A.) falls out of the sky, his life of pacifism suddenly becomes complicated. The animal turns out to be an angel, Ikaros.
"Peace and quiet is the best!" That's the motto of everyday high schooler, Tomoki Sakurai. But his peaceful life is being torn apart after the girl Ikaros suddenly fell from the sky one day. She calls herself a "Pet-class Angeloid", and Tomoki her "Master" because he's the first person on Earth she met. Also, she has the mysterious power to make all his wishes come true!
Sohara is in a bad mood after seeing Sakurai on top of Ikaros and getting the wrong idea. Ikaros hastily chases after her and, as such, Ikaros follows him to school. A card that Sakurai receives from Ikaros glows, and in that instant, Sohara's panties come off and go flying into the sky. It doesn't take much time at all before all the girls in school's panties are flying off into the sky!
Tomoki, suffering from a never-ending amount of math homework, decides to have Sugata-senpai help him out. President Satsukitane leads him to Sugata's home, only to find that it's a tent pitched next to a river! Tomoki and the gang have fun camping next to the river after finishing their homework. Ikaros is told to go shopping for ingredients when they all decide to make curry, but...
The flock of panties that flew off into the sky in Episode 2 have returned to Tomoki! Tomoki is estatic, but Sohara uses one of Ikaros's cards to make it so that any panties Tomoki sees will explode. Tomoki decorates his house with all of the panties, without knowing what Sohara has done. Will Tomoki be able to escape from his home with panty explosions looming around every corner? It's the first real action in "SoraOto"!
Long story short, Tomoki's house is destroyed. Wandering aimlessly, in search of a place to stay, Tomoki and Ikaros are lent a hand by the class president, Satsukitane. Sohara and Sugata join the mix as they are invited to the home of the town's #1 big shot. They are given a warm reception. But, when they wake up in the morning, there's an angry mob with them!
Summer vacation. The entire New World Discovery Club heads to the beach. Tomoki is surrounded by attractive girls in their swimsuits, but ends up having to deal with Ikaros. Sohara explodes with jealousy as Tomoki has his full attention on Ikaros. Ikaros shows another frightening side of herself because of a small situation and the second Angeloid...
Ikaros and Nymph also settle down in Sakurai's house. They get bored while Itsuki is at school, use a card, and transfer into his school! They instantly become popular as two new beautiful transfer students. But then what does Nymph do when she quickly gets bored at school...?
A fun festival in Sorami town. But, at the student body president's suggestion, the entire town is turned into a survival game! The winner gets $100,000! Gunfire and shrieks fill the air, and who is the mysterious old man who lurks at night? Admist the chaos, Nymph and Ikaros team up to battle for their lives!
Tomoki and the gang go to an outdoor BBQ. Tomoki tries to open a stall to make some money, but no matter what he does it fails. Then he gets Nymph's help to open a host club! Meanwhile, Ikaros is trying to act like a human for Tomoki's sake when she hears the words "It's human to lie."
Tomoki's high school is having a cultural festival with a rich private high school, where Tomoki & the gang perform a song. Ikaros surprises everyone by singing lead vocals.
Tomoki invites the girls to a bathhouse.
Tomoki tries to get Ikaros to smile.
The Harpies tell Nymph they are supporting her mission to help capture Ikaros because the Master of Synapse was worried about her. Tomoki and the others prepare for their Christmas party at his home.